Boiler-furnace.



No. 835,106. PATBNTED Nov. 6, 1906.

J. R. FORTUNE. l BQILBR PURNAGE.

APPLICATION FILED SEPT. 11. 1905` 2 SHEETS-SHEET 1.

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l/Mr/vfsss l PATENTED NQV. 6, 1906. L J.- R. FORTUNE. BOILER PURNACB. PLIOTOK4 FILED SEPT. 11. 1905.

2 SHEETS-SHEET 2.

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)um F Q5 mh. mi w v STATE-s PATENT JoiiN RoBERTroiiTUNE, iiosfroi'rgl MssAoriUsEris. i

A i l 'solLE--l-'unmcst nassenoe. I

To all whom/it may i 'l .Be-.it known that I, JOHN ROBERT FonrUNE, a citizen of the United States, residing at Boston, in the county of Suffolk and State 5 l5 of Massachusetts,'have. invented certain new, and .useful Improvements in Boiler-Furnaces and I do here y declare vthe following to be a `full, clear, and exact descri tion of the invention, such as enable ot Iers skilled inthe" art to which it appertainsl tomake and use the same.

Thepresent inventionrelates to improvements in boiler-furnaces, and more particularly to improved meansl for insuring the` au'- i tomatic feed and proper distribution of fuel to such furnaces.

or boiler-furnaces which shall structed and arranged as to feed the fuel thereto .regularly and evenly and maintain' the height. ,of the re at a regular andpredetermined hei ht and generally to insure the proper comustion of .the fuel and the gases generated thereb Furtherobjects of the invention will. ap-

' pear in connectioniwith the following de-v scription of its construction and .mode of operation. p

The invention, therefore, consists of theim-V proveinents inboiler-furnaces and .fuel-feed-l ing ap aratus therefor, which will be hereinafter escribed and claimed.

The present invention is showii in the accompanying drawings, in whichj .Figure 1 shows, `in partial end elevation and partial vertical sectional views, a boiler equipped with mylfurnaces and stokng mechamsms. "Fi .2s owsalongitudinalsectional view throug one ofthe furnaces, taken on f the line 2 2 in Fig. 1. Fig 3 shows a lon itudinal sectional -view through` oneof t e stokers,' taken on the line 3 3 in Fi 1..

vSimilar reference characters wil be used throughout the specification and drawings to desi nate corresponding arts.

`In tie illustrated embo iment offmy inven-tion I have shown my im roved furnaces and stokng mechanisms as being embodied ina so-called Lancashire boiler, in'whi'ch represents the outer shell, and 2 -the im-I provedfurnaces and stokin mechanisms, of.

which there are two locate within the shell of the boiler` and suitably su ported therein in any convenient manneror instance, as

' \Fig. l, for a `stantially vertical fiamme mw.A e, i906.

by bolt' them, as shown at 3, to the opposite end p ate 4 of the boiler-shell.

. Each of the'furnaces consistsof a c lindrical chamberI 5, made u of `cylin 'cal sectionsiiangedandboltedto ether,as shown 6o at 6, and'within these cylin rical chambers are contained the glrates and other parts of the furnaces, toget er with portions of'the stokng mechanism; .4 'Y

The stokng mechanismsin the-'illustrated 65 embodiment of .my invention consist of feedboxes7, arranged upon opHosite sides of the grate and extend ara el to each otheri thmel and the grate, ng suitably supported at their inneren s u on. a block 9 and at 7o v their forward ends by t e front of thefurnace The object of the present invention is tofl rovidean automatic fuel-feeding)apparatusE e ,so conand provided at their forward ends, outside of the front end plate 4 with open hoppers 10, into which theruei will be shoveied and from which it Awill be fed into the feed-boxes 7 and 75 -discharged upon the grate vand ire.

Each of the feed-boxes will be substantially rectangular in cross-section, as shown in the sectional view, Fig. 1, and will be provided with the discharge openings or slots 11. along 8o the upper inner surfaces andtheirupper surfaces will be curved inward, aslshowi'i' at 12,

purpose tobe hereinafter dey scribed.

Each of the feed-boxes 7 will be rovided `8 along its bottom with a longitudine slot 13,' narrower than the bottoms of the feed-boxes, thus providin flanges 14; (ge

the.. inturned supporti e sectional view, ig. 1 )11 Upon these flanges 14 will 'be supported'the 9o reciprocating fuel feeders or us ers 1 5 `and 16, each pusher being provi' ed with aninclined fuel-elevatin surface y17 and va subel-pushing surface 18. (See Fig. 3 of thel drawings.) These fuel- 95 feeding ushers are arranged in two or more groups designed to have longitudinal reciprocating movements along the bottom of the hoppers 10 and feedboxes 7. l

As illustrated in the drawings, thefuelroo feeding pushers are arranged in two groups,

`those marked v15 comprising one roupand those markedl comprising the o er oup, and these two groups 15 and 16, `as` efore stated, are arranged to have a Simultaneous x05 longitudinal reciprocating motion inoppo- .site directions-that is to say, while, the

group 15 is moving toward the right, as "the a] aratus is illustrated in 3, the ou be moved toward the left. P

no v

Y observed that t f adjustable alo For the purpose of imparting this reci ro eating movement to the groups of us ers any desired or suitable mechanism a be employed, that shown in the drawings, owever, being the best form now known to me and comprising the segment-gears 19 and 20, engaging, respectively, with gear-teeth 21 and 22, ormed upon the Shanks of the initial pushers 15 and 16, respectively. (See Fig. 3.) The segment-gears 19 and 20 are connected to segment-gears '23 and 24, res ectively, the segment-gear 24 being provided with a short arm 25, 'whereby 1t may be rocked, and thus through the segment-gear 23 transmit the rocking motion to the segmentgear 19, whereby the initial pushers 15 and 16 may be reciprocated in opposite directions. l

For the purpose of im arting a like reciprocating movement to the-other pushers of the grou s of pushers the initial pusher 15 is provide with a rod 26,held thereto by nuts 27, which rod extends through a bearing 28 in the initial pusher 16 and thence throu h downwardly-extending slotted arms 29 of the pushers 15 and similar slotted arms 3() of the pushers 16, and the initial pusher 16 will be provided with a similar rod 31, held by nuts -32 to the shank of the initial pusher 16 and,

like the rod 26, passing through the slotted arms 29 and 30 of the other pushers 15 and 16 of the series. The rod 26 will be provided with collars 33, fitting between the slotted arms 29 of the group of pushers 15, and the rod 31 will be provided with similar collars 34, ittin the s ace between the slotted arms 30 o the pus ers 16.

Fromthe foregoing descri tion it will be observed that by means of t e rods 26 and 31, respectively, and their connections with the pushers .the entire group of pushers following the initial pushers 15 and 16 will partake of the reciprocating motions imparted tothe initial ushers by the 4gears and segments before described and that as the group of pushers 15 moves in one direction the groupmf pushers 16 will simultaneousl be moved in the opposite direction. It be e collars 33 and234 are arranged to have some lost motion between the slotted arms of the ushers, and from this it followsthat by ma g these collars either I of suitable was ers limitin the play of any given one or more of the co ars with relation "to the slotted arms of the pushers .the range of movement of these pushersl may be varied,

and it is the intention that the extent' of movement of the pushers shall be reduced Agradually fromA the forward toward the rear for from the left to the right, asfshown in Fig.

, 3, .sonthatthe feed of the fuel shall be graduallyreduced as it a preaches the rear. Thus the pushers towar the left will deliver fuel to t e succeeding pushers in .the-*series of 'slots 11 and guided by the curved overhang their rods or else by the use pushers and also will by their excess of movement cause the` proper overflow of the fuel through the slot 1 1 into the fire and ate.

The action of the feeding-pushers 1s as follows: Sup osing the hoppers to be filled with fuel and t e oups of pushers reciprocating in opposite lrections, those pushers whic are moving toward the rear or inner end of the feed-boxes push the coal or fuel toward the inner end of the feed-boxes. The pushers which are moving in the op osite directionthat is to say, toward the oppers--will by their inclined surfaces raise or elevate the mass of fuel and as the recede will leave a space in the mass of fue into which the fuel which is bein ushed by the other group of pushers will gall. Thus when the stroke is reversed the mass of coal will be pushed forwardly into the next succeeding pushers and toward the inner end of feed-boxes, and so on until it reaches a point where the pushers are not makin so long a stroke owing to the adjustments efore referred to. As the fuel approaches the inner end of the feed-boxes it is ap arent that a portion of the fuel will not be fe onward so speedily as it is being fed at the front end of the stoker, and in consequence the mass of fuel as it a proaches the rear end of the feed-boxes will e gradually added tb, and in consequence the reciprocating movement of the pushers will 've an upward movement to the Whole bo y of coal above them b the accumulation of coal due to the gradua retardation of the feeding movement, and this accumulation and upward piling of fuel will cause it to pass out of the ing ortions 12 of the feed-boxes the fuel w1 be eposited upon the fire and grate evenly and to a predeterminedhe' ht, as shown in the sectional view, Fig. 1, t e curved overhangin portions 12 ofthe feed-boxes leading the fue onto the fre and grate.

For the' purpose ofrocking the arms 25 they will be connected, by means of links 35, to short crank-arms 36, xedto a rock-shaft 37, supported to rock in suitable bearings 38 at the ack of the hoppers,-which shaft 87 will be given a rocking movement by any suitable ower-driven mechanism. The shaft 37 will be connected to and operate the entire series `of usher mechanisms.

'ghe grate of my improved furnace consists of bars 39, which are supported in an inclined position, as shown in the sectional view, Fig. 1, upon the inner wall of the feed-boxes 7 and upon a sup ort or bearer 40, extending longitudinally t ough the furnace and sup rted at its forward end by aplate 41 andpt its rear end by a bridca-plate 42. (See Fig. 2.) Each of the gratears 39 will be provided upon its o posite sides with ribs 43, boerin such angu ar relation to the longer paralle edges of thagrate-bar that when the gratebars 39 are supported as shown in sectional llO4 , view, .1, che 11u43- will be 'in sebum-r tially horizontal planes, (see sectional view,l 1 ofthe and when the gratebars are;.1n position as shown in Figa 1 and2 these horizontal ribs 43,-closely abutting each: othel:,-will/form ducts or passages 44 and at the's e time will prevent the finecoal or oth'afiiel from through the grate, all

of whichv will be. clear from an inspection of the sectional view of Fig. 1 of lthe' drawings; The bearer 40 will be also supportcd ly the 1n.- termediate' inclined support -stan ards 4 5.

Mounted'in the beater40 a clinker-bar 46', which, as shown, is provided with teeth 47 and which is arranlged to rotate for the urpose of breaking up t e clinker which bar 46 will lhave imparted to it intermittent step-bv-step rotationy and this may be se- -cured by -a ratchet-wheelr 49 secured to the an 'llar forwardend of theclinker-bar, and a roc g lever 51, mounted to freely rock upon the ratchet-wheel 49, which lever will'be provided with a pawl 50, arranged to engage the ratchet-teeth of the ratchet-wheel'49, thus. as the lever 51is rocked imparting a step-bystep or intermittent the @linker-bar; l

therockin movemetof the lever 51 wil be imparte from the shaft 37, towhich said lever 51 is connected by a link turning movement to 52, the link l52-being connected to the lever 51 by a universal joint (not shown) and to the crank-arm 53 by a universal joint 54.

From V`the foregoing it follows that as the shaft 37 is rocke ing coal-pushers it will also, thro crank-arm 53 and its connections w1th the lever 51, rock the -lever 51, thus through the pawl `imparting a step-b -step rotatin movement -to the clinker-` ar, which Wi accordin ly, by means of the teeth 47 thereon, reak up the clinker and ash and cause it' to fall into the ash-pit 48.

Preferably the bearer or su port for the grate-bars 40 will be provide with longitudinal pipes or holes 55and the clinker-bar Witha s1m1lar pipe or hole 56, through which bary and also for the purpose of cooling the l clinker and making it morebrittle, whereby a currentV of water or air or other cooling medium may be passed, both for the pur ose of prolonging the ife of the bearer and c erit may be more readily brokenu and removed from the re by the clinkerar.l

Extending longitudinally along th'e furnace, below the grate and suplported b lthe inclined supports 45, are the p es 57, orming beneat the feed-boxes lsuitable guards or dust-pits, in which is collected, any combustible unconsumed fuel which may fall through the grate-bars or from the feedboxes, and as such material accumulates it can be removed and shoveled back into the' hoppers and again f ed into the furnace. Rest-f fall. into the ash-pit 48. Preferablythis clinkerto operate the reciprocatugh the fire-bricks v58, each of which is formed as a upon the ofthe feed-bOXeS i the. l I

segment of a circle and provided at its lower end with the rib 59, which as shown in Fig. 1.of the dra 1ron plate 60, which enga erecesses 63, formed in the back of the fire-ricks 58, the bricks being slid into position on the blocks or bars 624 from the front or the rear of the Stoker.

Instead of the bars 62 be'v formed continuous they may be formed'o anumber of sections, each section being the length of the width of a single brick, and thus each alternate brick will be held by asection of the bar 62 While the adjacent or intermediate bricks will be heldin position by the feed-boxes and the fxictionbetween their surfaces and thel adjoining-supported bricks.

Atthe forward part of the furnace and supportedupon thebricks 58 are the segmental bricks 64, which extend entirely over the re and ate andatthe forward end of the furnace orm an arch against'which the le gases dischargedfrom thelburngases or products of combustion in the for- Ward part of the furnace will come lin' contact,

and as this arch when the'fire is burning becomes incandescent these gases andthe products of combustion are thereby-decomposed IOO and readily united with 'the air admitted through the air passages orfducts 61. vSuch gases are of course"y at a, very high tempera-- ture-and will pass alon .the furnace at the top, and at the rear of t e furnace whereth'el arch is disconnected, these `gases and products of combustionv 'being of a very high i temperature, Will' act in the same manner o nl the gases evolved from the fire as the incandescent archdoes at the front of the furnace.

It is of course desirable to re' late the extent of movement imparted to t e clinkerbar 46, and for this purpose there is provided a lever 65, pivotall mounted upon a boss or bearing 66, and w 'ch carries at one end a guard or shield 67, covering u a portion of the ratchet-teeth 'of the rato et-wheel 49, l

and by adjusting thelever 65 with relation tothe stroke of thepawl 50 this guard or shield 67 will hold the pawl out of contact greater or less portion of the movement -of the pawl. Thus the intermittent rotations of the clinker-bar 46 will be readil adjusted.

The position of thelever 65 an its adjustment W1ll be maintained by means of apin68, which passes through a hole in said lever and .into any one of'a series of holes` 69 in the front lof the stoker. (See Fig, 1 of the drawings.)

Vwithl the teeth of the ratchet-Wheel for a l =Forthe purpose of preventing clinkers `and coal fal into themechanism for o erating *the -c ker-bary there is rovi ed a shield 70, extendingI acrossthe ont of the furnace and above the pavvl-and-ratchet mechanism andjust below the fire-doors 71.

. The fre-doors-71- will be provided with airinlets y72 at their lower ends 'and u ontheir inner surfaces =with liners 73, whic willl be edges.

provided With air-'inlets 74h at' their upper Thus by the admission offfair the liners are prevented from-burning Iand at the same time -air is admitted into the furnace. The furnace will alsofbe' provided with suit-4 .15

able ash-pit doors 75.

It is thoughtv hat the operation ofA m in vention has been suiciently `disclose "by the-foregoing description of its formi and arrangementrand that any further description of its operation Will be found to be unnecessary.

as new and desire to protectby ALetters Patent ofthe Unitedy Statesgroup? of pushers along said- :feed-box' in suita direction to adjacent groups of pushers;'subv boi I per and extending into the furnace and hav-vv wlng a discharge-opening within the-furnace,

1.4 In combination, a boiler, a furnace, a

hopper having a fuel-opening outside of the' boiler, a feed-box connecting with the hop-l per, extending into the furnace and having a discharge-opening Within the furnace, a

plurality of overlapping pushers'located within the feed-box and means-for longitu` Idinally reciprocatin said ushers 'along said feed-box, substantia ly as ascribed.

2. In combination, a boiler, a furnace, a per havin a fuel-openingfoutsidelj the er, a -feedox connecting With-the hopa plurality of imperforate overlapping pushersv located Within the feed-box and comprising al plurality of: groups of pushers, and means for alternate y=. reciprocating Vthe le time relation and 'anopp'osite stantially as described.

` hopper havin 31. In combination, a boiler, a furnace, a a` fuel-opening outsidethe boiler, a` .feedoxconnecting with the hoper, extending into theA furnace and Ahaving a u..

- 'scharge-ope'ning Within the furnace, a

' rality of im crforate overlapping #pus ers located Withm the feed-box and arranged in-two oups,the indivi-dual ushers in 'one group ay ternating 1With the' in', y'vidualpush- Vralityo pus boiler, a fee vper, extending into-the furnace and havin a Havingdescribed my: invention, I claim with relation to'the length of stroke o others 'of said pushers, substantiall as described.

' 5. In combination, 'a boi er, afurnace, a hopper having al fuel-opening outside the dox connecting with the hopischarge-opening Within the furnace, a p urality of longitudinally-reciprocatingpushers located Within the feed-box, a air of reciprocating rods each rod connecte with the alternate pushers and connected -mechanism for reciprocating the rodsfsirnultaneously in opposite direct1ons, `substantially as descrlbed.

6. 1In combination, a boiler, a furnace, a

hopper and its connected feed-box, the A'feed- -box having a discharge-opening within-the furnace, a pair of reciprocating rods, a lurality ofushers located Within the feedox and over apping each other and the alternate l ushers connected respectively with ofD the'reeiprocating rods, substantially as described.

7. lIn combination, a boiler, a furnace, a

hopper, a feed-box extending Within theffurnace and provided'within-the furnace with a discharge-opening, a plurality of overlapping 'pushers located within and arranged to'rceiprocate along said feed-box,l reciprocating rods for o erating saidpushersandmeans whereby t e movement of yone of the push- 'ers actuated `by saidrods may be adjusted independently'of another of vsaid pushers, substantially as described. AIn testimony whereof I -JOHN- ROBERT FORTUNE.

- Witnesses:

' T. Ham"- ANDERSON, MAY A; KENNEY.

ICO

affix my signature in presence oftwo Witnesses. 

